13320322121 has 2 divisors, whose sum is σ = 13320322122. Its totient is φ = 13320322120.

The previous prime is 13320322117. The next prime is 13320322129. The reversal of 13320322121 is 12122302331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7843582096 + 5476740025 = 88564^2 + 74005^2 .

It is a cyclic number.

It is not a de Polignac number, because 13320322121 - 2² = 13320322117 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 13320322093 and 13320322102.

It is not a weakly prime, because it can be changed into another prime (13320322129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6660161060 + 6660161061.

It is an arithmetic number, because the mean of its divisors is an integer number (6660161061).

Almost surely, 2^13320322121 is an apocalyptic number.

It is an amenable number.

13320322121 is a deficient number, since it is larger than the sum of its proper divisors (1).

13320322121 is an equidigital number, since it uses as much as digits as its factorization.

13320322121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 13320322121 its reverse (12122302331), we get a palindrome (25442624452).

The spelling of 13320322121 in words is "thirteen billion, three hundred twenty million, three hundred twenty-two thousand, one hundred twenty-one".